Hot-air furnace



(No Model) A. B. PAINE.

HOT AIR FURNACE.

Patented Mar. 1,

INVENTOR:

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ABE-AM B. PAINE, OF VERMONTVILLE, MICHIGAN.

HOT AlR FURNACE.

SPECIFICATION forming part of Letters Patent No. 358,621, dated March 1, 1887.

(No model.)

To all whom it may concern:

Be it known that I, ABRAM B. PAINE, of Vermontville, in the county of Eaton and State of Michigan, have invented a new and Improved Hot-Air Furnace, of which the following is a full, clear, and exact description.

My invention relates to certain improvements in'hot-air furnaces and in the radiators connected therewith.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a sectional elevation of my new and improved hot-air furnace. Fig. 2 is a see tional elevation of the same, taken on the line at m, Fig. 1.

The invention will first be described in connection with the drawings, and then pointed out in the claims.

A represents the furnace proper, or firebox, and B Orepresent the radiators arranged above the furnace, the whole being inclosed by the walls D, of brick.

The furnace A is, by preference, made heartshaped in cross section, as shown in Fig. 1, and set so that the fire-box will be wider at the top than at the bottom, thus causing the fuel to settle together upon the grate-bars E as it burns away, causing a better combustion.

The walls of the furnace A are stiffened by the casting F, bolted to the inner surface of the walls, so they will not warp or sag in case they become overheated. A cross-piece, F, is secured to the casting F, and spans the lower part of the furnace A, for supporting the inner ends of the grate-bars E, the outer ends thereof being supported by the cross-piece G, secured to the front casting, G, in line with the crosspiece F, as shown clearly in Fig. 2.

Upon the back plate, H, of the furnace is formed the inwardly-projecting ledge H, which supports one end of the perforated plate I, the other end of this plate being supported upon the cross-piece F. The space below the grate-bars E and the plate I forms the ash-pit of the furnace, to which access is afforded through the door J.

The interior of the furnace above the gratebars E and the plate F is lined with corrugated and perforated fire-backs K, which are held a short distance from the inner surfaces of the walls of the furnace A, thus forming spaces L between the furnace and the firebacks, which spaces communicate with the ash pit, so that a circulation of air will be maintained between the fire-box and the walls of the furnace to protect the latter from intense heat. Access to the interior of the furnace proper is afforded through the door M.

The radiator B is made elliptical in cross section, and is divided into three longitudinal eompartments-the two side compartments, B B, and the central compartment, B -by the partitions B B", which are, by preference, inclined in opposite directions, so that the ecu tral chamber, B, will be \l-shaped, as shown clearly in Fig. 1. The partitions B are of less length than the radiator B, and are placed with their rear ends in contact with the back plate, 0, of the radiator, so that a passage, 0', is formed at the front of the radiator between the front plate, 0', and the adjacent ends of the partitions B and the side compartments, B, of the radiator are connected near their rear ends, by flue-openings N, With the furnace A, so that the current caused by the draft will be from the rear end of the side chambers, B, forward to the front of the radiator, thence into the central \I-shaped compartment, B back to the rear of the radiator, and then through the flue-openings P P to the up per radiator, O.

The upper radiator, O, is in all respects like the radiator B, being divided into side and central compartments, 0 O, by the oppositely-inclined longitudinal partitions G and the partitions G like the partitions B", are of less length than the radiator, and are placed therein so as to form the front space, 0 so that the current in the upper radiator, like that in the lower one, is from the rear forward in both side compartments, thence back through the central V-shaped compartment to the chimney-flue Q, connected to the upper radiator near its rear end.

Connected to the front plates, 0 O, of the radiators are short pipes R, which reach through the briclework D, and are closed at their outer ends by the caps B, so that by retors may be cleaned of ashes, soot, &c., and

through each partition B of the lower radiator, B, is formed an opening, S, closed by the damper-plates S, each attached to and operated by a rod, S reaching to the front of the furnace. The openings S in the partitions are in line with the flue-openings PN, so that when the damper-plates S are opened the draft will pass directly from the furnace A to the upper radiator, C, so that the lower radiator, B, may thus be thrown out of action when desired. 7

By setting the partitions of the radiators at opposite inclinations the heat is confined near the surfaces of the radiator at both sides and at the top, thus causing the radiator to give off the maximum amount of heat, and by causing the currents of the side fiues of the radiators to meet at the front of the radiators an intense heat is produced at this point, which is largely given off through the front plates of the radiators, and this intense reverberatory action, caused by the meeting of the two currents, causes the smoke to be consumed, thus effecting a better utilization of the fuel.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. The combination, with the furnace or fire-box, of the superposed radiator having central and side compartments, the central compartment opening into the side compartments at one end and the side compartments opening into the furnace or fire-box at the opposite end, substantially as and for the purpose set forth.

2. The combination, with the furnace or fire-box, of the superposed radiators, each having a central compartment and side compartments, the central compartments opening into the side compartments at one end, the side compartments of one radiator opening into the furnace at theopposite end, and the side compartments of the other radiator opening into the lower radiator at the same end, substantially as and for the purpose set forth.

3. The combination, with the furnace or fire-box, of the superposed radiators, each having a central compartment and side compartments, the central compartments opening into the side compartments at one end, the side compartments of one radiator opening into the furnace or fire-box at the other end, the side compartments of the upper radiator opening into the lower radiator at the same end, and the partitions of the lower radiator having slides or dampers disposed in alignment with the openings in the side compartments of the said radiators, substantially as and for the purpose set forth.

ABRAM B. PAINE.

Witnesses:

JOHN FERRIS, v Soorr H. RORABEOK. 

